Velcro Backed-up Holder – Super Flex Free Velcro Backed-up Holder – Super Flex Description Super Flex rubber velcro packer with maximum flexibility Super Adhesive used to prevent separation of Velcro M14 Thread Available Sizes 4″ (100mm) Diametre / M14 Thread SKU: VBSF Category: Couplings. Contact Us Leave Feedback Share Related Products Free Velcro Backed-up Holder – Aluminum Couplings Free Velcro Backed-up Holder – Foam Cushion Couplings Free Velcro Backed-up Holder – Rigid Couplings Free Velcro Backed-up Holder – Steel Couplings Free Velcro Backed-up Holder – Flexible Rubber Couplings Free Snail Lock Velcro Backer Plate Couplings